Door-bell



(No Model.)

F. SANDERSON.

DOOR BELL.

Patented Deg. 14, 1886.

UNITED STATES PATENT OFFICE.

FREDERICK SANDERSON, OF CHICAGO, ILLINOIS.

coon-BELL.

SPECIFICATION forming part of Letters'Patent No. 354,351, dated December14, 1886,

Application filed September 11, 1895. Serial No. 176,806.

To all whom it may concern.-

Be it known that I, FREDERICK SANDERSON, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Door and Call Bells, ofwhich the following is a specification, to wit:

This invention relates to door and call bells; and it consists incertain peculiarities of the construction and arrangement of the same,substantially as will be hereinafter more fully set forth and claimed,whereby the bell is operated by a push-button in exact imitation of anelectric bell in both sound and appearance, andwithout the use of awinding spring, substantially as will be hereinafter more fully setforth.

In order to enable others skilled in the art to which my inventionpertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the accompanying drawings, inwhich-- Figure 1 is a vertical section of a portion of a door having mydevice in position for use. Fig. 2 is a View of the operating mechanismof my device taken from the opposite side from that shown in Fig. 1, andFig. 3 is a sectionalview oa modified form of the invention.

(t represents a door or door-frame, Wall, or other place to which it isdesirable to apply this invention. Upon the inside of this door a issecured a casting, b, on one portion of which is a post, I), carrying abell, if, of suit able form and size. Upon this casting or baseplate isalso a small box or case, b in which is journaled a shaft, 0, on whichis a toothed wheel, 0, similar to the escape-wheel of a clock. Upon asecond shaft, 0', is secured the bell-hammer 0 which passes out of thebox or case through a slot, 1), therein, which admits of the requisitemovement, and ends in proper position with relation to the bell. Uponthe shaft 0 is also a pallet, 0, which is engaged and operated by theescape-wheel to give a vibratory movement to the hammer. Upon the shaft0 is also asmall loose pinion, d, which is provided with aspring-actuated pawl, d, engaging a ratchet, (P, on the shaft, or on theescape-wheel, as may be. A bar, 6, is arranged to slide through the boxor case in close proximity to the pinion, and is provided (No model.)

with a series of teeth to engage said pinion, as shown.

The base-plate is provided with a sleeve, f, which extends a shortdistance into the door, and in it lies normally the outer end of therack-bar 6. At its inner end the sleeve f has a perforated end plate, f.The bar 6 is provided with a head or shoulder, e, on its end, and issurrounded bya spring, a", by which it is returned to place after beingpushed in.

Upon the outer side of the door or frame is a small button-guard, g, ofcircular or other form, having its front formed with a recess, 9, andits rear side provided witha screwthreaded shank, which is screwed intothe door and retains the guard in place. Vhere the tubular shank 9 opensinto the recess 9'', I form a flange, 9 which serves as a stop to limitthe outward movement of the slide hereinafter described. The shank g ishollgw, and in it is a slide, 9 provided with an arm, 9, extendingthrough to the front of the guard, which in appearance resembles theordinary puslrbutton used with electric bells and signals. A stiff wire,h, is at one end socketed into the rack-bar, and at the other restsagainst the slide, thus forming a rigid connection between them.

In operation the main casting is secured to one side of a door, with thesleeve extending into one end of a small hole previously formed throughit, and the guard is screwed into the opposite end of this hole, theconnecting-wire, being cut of the proper length to connect the two, isthus easily fitted to any door or frame, of whatever thickness it maybe.Upon pushing in the button the rack-bar and pinion impart motion to theescape wheel and cause a rapid series of vibrations of the hammerginexact imitation of that of an electric bell. The release of the pressureallows the springactuated rackbar to return at once to its formerposition, the ratchet permitting this to be done without striking thebell.

The device is intended fora mechanical imitation of an electric bell,and its great simplicity and cheapness enable any one to put it in placeand operate it. As here shown and described it is adapted for use withina short distance of its opera-ting-buttonjbut should it be desired toplace it at some distance the device is simply turned around and anordinary pull-Wire and knob connected to the inner end of the rack-bar,and operated as readily as before.

In Fig. 3 is shown a modified form of device, in which instead ofarack-bar is used a bar I having a spiral groove or thread around it,

. it, as Shown.

and the escape-wheel and ratchet placed upon When this shaft is pushedin,

the escape-wheel is turned by the spiral, and

the effect is the same as before. This form possesses the advantage ofcausing the hammer to vibrate across the inner side of the gong, andthus gives it a larger stroke and more compact arrangement.

It is evident that the precise means herein shown for operating the hellby means of a push-button is not material, and may be varied to suit therequirements of the special case. The main idea of my invention is toimpart a series of vibrations to the hammer by a single push of thebutton, and it is evident that the intermediate devices between thebutton and hammer may be greatly varied to produce this result.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a door or signal bell, avibrating hammer and a slidingoperating-bar connected therewith by intermediate mechanism, and aretracting spring therefor, in combination with a push button or slideand a stiff wire arranged between the bar and slide, socketed in one andbearing against the other, whereby the connection is readily adapted todifferent distances, substantially as and for the purpose set forth.

2. The combination of the base plate or frame having a sleeve, f,provided with a perforated end plate, f, the bell, the slide-rodconnected with said bell and having an extension projected into sleeve],and provided with a head, 6, a spring for retracting said slide-rod, thebutton, and a connection between said button and slide-rod,substantially as set forth.

3. The improvement in bells, substantially as described, consisting ofthe base plate or frame having a sleeve, f, provided with a perforatedend plate, f, the button-guard g, having a recess, 9, a tubular shank,and astopflange, 9 the slide 9 operating in shank g", and provided withan arm or extension, g, the bell, the slide-rod connected therewith andex tended into the sleevef, a spring for retracting said slide-rod, anda connection between the same and the slide 9 all substantially as setforth.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK S A NDERSON.

Vitnesses:

W. G. MOARTHUR, ED. TRABUE.

